Development

Eggs are laid on a variety of hostplants, belonging to the families Solanaceae, Verbenaceae, Fabaceae, Oleaceae, and Bignoniaceae, among others. Mature larvae can attain 125mm long, and occur in green, yellow, and brownish grey color forms (most commonly grey), with oblique body stripes and a prickly tail horn that is curled at the extreme tip. When molested the caterpillar throws the head and anterior segments of the body from side to side, at the same time making a rapidly repeated clicking noise, which appears to be produced by the mandibles. The larva pupates by pushing its head into the earth, burying itself, and making an ovoid chamber about 15cm below the surface in which it sheds its skin.